Mechanical puller



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- J. GRAHEK MECHANICAL FULLER Filed Sept. 16. 1921 ranted es; as, re.

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Application filed teptember 1c. 19 2].. Serial No. Mitts.

1ke, from the shaft or axle upon which the are mounted.

The principa object of the invention is to provide such a device whichis simple in construction and susceptibleof a wide range of adjustmentfor accommodation to various requirements.

Other objects and advantages of the invention will appear in the furtherdescription thereof. 7

Referring to the accompanying drawing in which like reference charactersindicate like parts, and wherein- Figure 1 is a top plan view of one ofthe improved pullers;

igure 2 is a side elevation,

Figure 3 is an elevation of a common belt which may be used in place ofthe specially designed pulling hooks, and Flgure 4 is a perspective viewof one of the latter.

1 represents a cross bar, or body portion of the puller whichispreferably of narrow oblong shape in plan view, having an enlarged orbossed central portion as at 2 through which is formed an internallyscrew threaded hole for the reception of the externally screw threadedoperating bolt 3. The bolt-3 has a suitably formed head i for convenientreception of a common wrench by which it is intended the device ma beoperated. The opposite end of the be t is preferably provided with acentral tit 5, or slightlyrounded or sharpened for engage- .ment againstthe axle or shaft from which the object is being pulled, such shaft oraxle usually being provided with a central de-' pression such as iscaused in the process of turning or makingof same. I

' In side elevation I prefer to make the cross bar of greater thicknessin the central portion, the-lower faces of which extend ra diallytherefrom, being inclined as at 6,

while the op osite face of the bar is preferably perfect y straight.

Throu h the two opposite ends of the bar and ara lel with the axial holethereof are formed elongated slots 7 iforv cooperative engagenzent withthe pulling hooks or bolts, the especially designed ones of which areillustrated at 8, there being a pair "of such hooks for each puller. Theobject. engaging ends of these hooks are preferably of generalrectangular form in cross section, are

provided with the hook like projection 9 at the extreme free end thereofand taper sllghtly towards such free end as clearly illustrated inFigure 4 of the drawing. They are also provided with laterallyprojecting shoulders 10, the uppermost faces of which are slightlyinclined to coincide with the inclinatlon of the cross bar, as they aremade to impmge same by theti htening of the nuts 11 on the upper cyindrical screw threaded bolt portion 12'of the hooks and whlch portlonis made extendable through the slots 7 in the cross bar. By thisstructure it is evident that the hooks may be moved either towards orfrom the central .portlon of the bar to accommodate difierent sizedgears or wheels being pulled and after belng once set to the propersize, for example intermediate of the spokes of the wheel andadjacent-the hub thereof, they may be drawn up tightly in suchestablished positlOIl on the cross bar before stress is put upon thepulling bolt 3.

This feature of myinvention is considered important in that it preventsany slipping or springing of the hooks out of position when the ullingis conducted.

In Figure 3 have illustrated a common screw threaded bolt 13 which maybe used 1n place of the hooks 8 which may be desirable in the pulling ofgears or wheels which have holes formed in the webs thereof adj acentthe shaft upon which they are mounted, when said bolts may be screwedinto the threaded holes made for this purpose.

Having thus described my invention, what ilaim and desire to secure byLetters Paten 1s:

A holding member for pullers having a mam cross-bar with opposed whollysurrounded slots therethrou h, said holding member being cylindrica andexternally screw threaded upon that end which is engaged within the slotin the crossbar, and

Nil

rectangular u on the opposite end, the int- D811 face of both ends ofthe member being ter being hoe ed for engagement with the in the sameplane. 3 object to be pulled, and. a shoulder at the junction of the twodifierent shapes of the (3 member, said. shoulder projecting principellin the opposite direction to that efthe Witnesses: hoe to prevent stressupon'the letter bend- S. C. BRONBON, ing the member backwerdly, thelongitudi- S. Geo. STEVENS.

In testimony whereof I hereunto afix my signature in the presenge of twoWitnesses.

OHN GRAHER.

